Home / 686,784.80-1,030,274.40-213,420.80

Finding the Fourth Proportional to 686,784.80, 1,030,274.40 and 213,420.80

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Solution

The fourth proportional to 686,784.80, 1,030,274.40 and 213,420.80 is: 320,161.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,784.80 : 1,030,274.40 = 213,420.80 : x
  2. Step 2: Convert to fraction form
    686,784.80/1,030,274.40 = 213,420.80/x
  3. Step 3: Cross multiply
    686,784.80x = 1,030,274.40 × 213,420.80
  4. Step 4: Simplify right side
    686,784.80x = 219,881,986,667.52
  5. Step 5: Solve for x
    x = 219,881,986,667.52/686,784.80
  6. Step 6: Final answer
    x = 320,161.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.